All it took was a crash between two cyclists to cause a chain reaction which ended up being one of the most massive and gnarliest pileups you could imagine. Riders went flying, bikes went flying, bike components went flying, and some riders went sliding down the course at incredible speeds. Luckily, there were no serious injuries.

The crash starts at about 40 seconds into the video below.

Many riders were wearing helmet cameras, so here are a few other angles of the crash.

And her'es a video of the winning run taken from Kilian Bron's helmet cam.